import router from './router'
import store from './store'
import NProgress from 'nprogress' // Progress 进度条
import 'nprogress/nprogress.css'// Progress 进度条样式
import { Message } from 'element-ui'
import { getToken } from '@/utils/auth' // 验权

const whiteList = ['/login'] // 不重定向白名单
router.beforeEach((to, from, next) => {
  const menus = store.getters.menus
  if (menus.length > 0) {
    pagePermissions(menus, to.path) // 解决 无权限页面返回 原来页面丢失权限
  }
  NProgress.start()
  if (getToken()) {
    if (to.path === '/login') {
      next({ path: '/' })
      NProgress.done() // if current page is dashboard will not trigger	afterEach hook, so manually handle it
    } else {
      if (store.getters.menus.length === 0) {
        store.dispatch('GetInfo').then(res => { // 拉取用户信息
          pagePermissions(store.getters.menus, to.path) // 解决登录显示页面的权限
          next()
        }).catch((err) => {
          store.dispatch('FedLogOut').then(() => {
            Message.error(err || 'Verification failed, please login again')
            next({ path: '/' })
          })
        })
      } else {
        next()
      }
    }
  } else {
    if (whiteList.indexOf(to.path) !== -1) {
      next()
    } else {
      next(`/login?redirect=${to.path}`) // 否则全部重定向到登录页
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  NProgress.done() // 结束Progress
})

function pagePermissions(menus, path) {
  for (let i = 0; i < menus.length; i++) {
    if (menus[i].href === path) {
      store.commit('SET_PERMISSIONS', menus[i].permissions)
      sessionStorage.setItem('permissions', JSON.stringify(menus[i].permissions))
      return
    }
    if (menus[i].nodes && menus[i].nodes.length > 0) {
      pagePermissions(menus[i].nodes, path)
    }
  }
}
